I will have flown 41 segments for the 2023 year as of this afternoon. All of them were transcon flights except for one between SEA and PDX. I have been upgraded to First Class on every flight except for one.
On my very first flight of the year, there were five open seats that were not filled for the flight, so I remained in Premium Class for the flight. I assume it was due to weight and balance concerns. Either that, or the upgrade processor wasn’t working for the flight as I likely was near the top of the upgrade list.